Note K - Common Stock and Warrants - Common Stock Activity (Details) - shares	4 Months Ended	12 Months Ended		15 Months Ended
	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019
Balance (in shares)		26,455,352	14,657,430
Common stock issued as a result of Convertible Note conversion (in shares)			598,568
Common stock options exercised (in shares)		101,739	23,682
Restricted stock vested during the period (in shares)		101,739
Balance (in shares)	36,350,785	36,350,785	26,455,352	36,350,785
2021NotesConvertedToCommonStockMember
Common stock issued as a result of Convertible Note conversion (in shares)		1,499,894
Optional Exchange Principal Amount [Member]
Common stock issued as a result of Convertible Note conversion (in shares)		2,000,000
Equity Line of Credit [Member]
Common stock sold (in shares)		3,521,471
Series A Preferred Stock Converted Into Common Stock [Member]
Common stock issued as a result of Preferred Stock conversion (in shares)		1,112,333	2,080,000	3,192,333
Series B-1 Preferred Convertible Stock Converted to Common Stock [Member]
Common stock issued as a result of Preferred Stock conversion (in shares)	1,659,966	1,659,996
First ATM Agreement [Member]
Common stock sold (in shares)		3,401,271	762,338
Underwriting Public Offering [Member]
Common stock sold (in shares)			8,333,334